WTM Register Maker is easy to use. Protect your software
with serial numbers and with Software Licensing System. This
program allows you to protect important files with cryptographic
protection.

Example:
You would like protect your registered full exe files in your shareware
download. When a customer orders a registered version. You send
him a key. With this key the customer unlocks the full exe and WTM
Register Maker (only loader needed) overwrite the shareware exe
with the registered exe file. The WTM loader knows when a right
serial number was entered in the past. Than it will start this exe
automatic.